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added amalgam antimony argentiferous argentite arrastra arsenic assay average blast furnace bluestone bottom bullion calcite carbonate cast-iron cent chalcopyrite Chapter charge Chilian mills chloridising coke concentration containing copper sulphate cost crushing cupel cuprous chloride described diameter dissolved employed feet fondo forehearth fuel galena gold grinding Guanajuato hearth heat hypo hyposulphite inches iron leaching lead smelting lixiviation loss of mercury loss of silver matte smelting matting melted mercury metallic copper metallic silver Metallurgy native silver ordinary oxide oxidised Patio process percentage of extraction precipitate produced proportion proustite pulp pyrargyrite pyritic smelting reactions reduced retorting reverberatory reverberatory furnaces rich roasting Russell process salt shown in Fig siliceous silver chloride silver sulphide slag slimes sodium soluble speiss stamps steam Stetefeldt sulphide sulphuric acid tailings tank temperature tina tons torta Trans treated treatment tuyeres usually vats volatilisation washing Zacatecas zinc
Page ii - METALS : Magnesium, Lithium, Beryllium, Sodium, Potassium, Calcium, Strontium, Barium, the Carbides of the Alkaline Earth Metals.
Page ii - Calcination — Motor Power and its Transmission - Company Formation — Mining Appliances and Methods — Australasian Mining Regulations. " PRACTICAL from beginning to end . . . deals thoroughly with the Prospecting, Sinking, Crushing, and Extraction of gold."— Brit.
Page v - ... career, commands our admiration because of the exhaustive attempts to get at fundamental principles. His own experiences, as well as the work of former experimenters, are set down in a way that all may imitate with profit and few will succeed in equaling. In beginning one of his prefaces, he says: "Of all the branches of metallurgy, that of which silver forms the subject is, in my opinion, the most extensive, the most varied, and the most complicated.
Page ii - A Complete and Exhaustive Treatise on the Manufacture of Lead, with Sections on Smelting and Desilverisation, and Chapters on the Assay and Analysis of the Materials involved. Price i6s.
Page ii - Comprising Details regarding the Sources and Treatment of Silver Ores, together with Descriptions of Plant, Machinery, and Processes of Manufacture, Refining of Bullion, Cost of Working, &c.
Page 203 - ... better results on ore containing base metals when there are no metals present to decompose the double salt. 5O. Solubility of Silver Carbonates. — Lead can be precipitated by sodium carbonate from the leaching solution. Lead carbonate so found is almost insoluble in sodium- hyposulphite solutions, while the carbonates of silver and copper are very soluble. The carbonates of iron, manganese, zinc, and calcium are also insoluble in hyposulphite solutions. These salts do not get into the hyposulphite...
Page 1 - ... the whitest of metals, and is capable of receiving a brilliant polish. It is harder than gold, but softer than copper. Malleability and Ductility. — With the exception of gold, it exceeds all the other metals in these properties. It is said that it can be hammered into leaves only f^oo °^ an mcn thick, and a single grain can be drawn into 400 feet of wire.
Page 134 - ... particularly to the following : — (1) Those in which the sulphides, though comparatively small in amount, are rich, say 50 ozs. to the ton or upwards. (2) Those in which the sulphides, though poor, are yet worth treating, and where they constitute more than 5 per cent. of the weight of the ore.
Page 4 - When silver is plunged into mercury " there is produced at the surface of the metal a very thin layer of amalgam, which arrests the ulterior action of the mercury...